%I #4 Apr 10 2017 12:37:11
%S 2,5,6,9,11,14,16,19,20,23,26,29,30,33,35,38,39,42,44,47,48,51,54,57,
%T 58,61,63,66,68,71,72,75,77,80,82,85,86,89,92,95,96,99,101,104,106,
%U 109,110,113,115,118,120,123,124,127,130,133,134,137,139,142,143
%N Positions of 0 in A284656; complement of A284658.
%C Conjecture: -1 < n*r - a(n) < 3 for n >= 1, where r = (3+sqrt(3))/2.
%H Clark Kimberling, <a href="/A284657/b284657.txt">Table of n, a(n) for n = 1..10000</a>
%t s = Nest[Flatten[# /. {0 -> {1}, 1 -> {0, 1, 1, 0}}] &, {0}, 7] (* A284656 *)
%t Flatten[Position[s, 0]] (* A284657 *)
%t Flatten[Position[s, 1]] (* A284658 *)
%Y Cf. A284654, A284656, A284658.
%K nonn,easy
%O 1,1
%A _Clark Kimberling_, Apr 08 2017